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A147907
as a simple table
n
a(n)
1
1
2
2
3
6
4
16
5
54
6
232
7
936
8
3880
9
23002
10
127008
11
751100
12
4670780
13
29781390
14
193211704
15
1334448490
16
9604883174
[1,2,6,16,54,232,936,3880,23002,127008,751100, 4670780,29781390,193211704,1334448490,9604883174]
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Last modified April 24 08:21 EDT 2024. Contains 371926 sequences. (Running on oeis4.)